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Merge "Adding scale factor check."

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This commit is contained in:
Dmitry Kovalev 2013-08-21 14:11:13 -07:00 committed by Gerrit Code Review
commit 3286abd82e
4 changed files with 22 additions and 4 deletions
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2
vp9/common/vp9_reconinter.c
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@ -210,7 +210,7 @@ void vp9_setup_scale_factors(VP9_COMMON *cm, int i) {
vp9_zero(*sf);
} else {
YV12_BUFFER_CONFIG *const fb = &cm->yv12_fb[ref];
vp9_setup_scale_factors_for_frame(sf,
vp9_setup_scale_factors_for_frame(cm, sf,
fb->y_crop_width, fb->y_crop_height,
cm->width, cm->height);

17
vp9/common/vp9_scale.c
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@ -10,6 +10,7 @@
#include "./vp9_rtcd.h"
#include "vp9/common/vp9_filter.h"
#include "vp9/common/vp9_onyxc_int.h"
#include "vp9/common/vp9_scale.h"
static INLINE int scaled_x(int val, const struct scale_factors *scale) {
@ -61,9 +62,23 @@ static int get_fixed_point_scale_factor(int other_size, int this_size) {
return (other_size << VP9_REF_SCALE_SHIFT) / this_size;
}
void vp9_setup_scale_factors_for_frame(struct scale_factors *scale,
static int check_scale_factors(int other_w, int other_h,
int this_w, int this_h) {
return 2 * this_w >= other_w &&
2 * this_h >= other_h &&
this_w <= 16 * other_w &&
this_h <= 16 * other_h;
}
void vp9_setup_scale_factors_for_frame(struct VP9Common *cm,
struct scale_factors *scale,
int other_w, int other_h,
int this_w, int this_h) {
if (!check_scale_factors(other_w, other_h, this_w, this_h))
vpx_internal_error(&cm->error, VPX_CODEC_UNSUP_BITSTREAM,
"Invalid scale factors");
scale->x_scale_fp = get_fixed_point_scale_factor(other_w, this_w);
scale->x_offset_q4 = 0; // calculated per block
scale->x_step_q4 = scaled_x(16, scale);

5
vp9/common/vp9_scale.h
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@ -14,6 +14,8 @@
#include "vp9/common/vp9_mv.h"
#include "vp9/common/vp9_convolve.h"
struct VP9Common;
#define VP9_REF_SCALE_SHIFT 14
#define VP9_REF_NO_SCALE (1 << VP9_REF_SCALE_SHIFT)
@ -33,7 +35,8 @@ struct scale_factors {
convolve_fn_t predict[2][2][2]; // horiz, vert, avg
};
void vp9_setup_scale_factors_for_frame(struct scale_factors *scale,
void vp9_setup_scale_factors_for_frame(struct VP9Common *cm,
struct scale_factors *scale,
int other_w, int other_h,
int this_w, int this_h);

2
vp9/encoder/vp9_temporal_filter.c
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@ -437,7 +437,7 @@ void vp9_temporal_filter_prepare(VP9_COMP *cpi, int distance) {
#endif
// Setup scaling factors. Scaling on each of the arnr frames is not supported
vp9_setup_scale_factors_for_frame(&cpi->mb.e_mbd.scale_factor[0],
vp9_setup_scale_factors_for_frame(cm, &cpi->mb.e_mbd.scale_factor[0],
cm->yv12_fb[cm->new_fb_idx].y_crop_width,
cm->yv12_fb[cm->new_fb_idx].y_crop_height,
cm->width, cm->height);